Denitrification of groundwater using Brewer's spent grain as biofilter media

Benyoucef, N.; Cheikh, A.; Drouiche, Nadjib; Lounici, H.; Mameri, N.; Abdi, N.

doi:10.1016/j.ecoleng.2012.12.092

Cited by 17 publications

(6 citation statements)

References 35 publications

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“…This research showed that the original composition, nature, the carbon-to-nitrogen ratio (C/N) and the degree 13 of maturity and stability of the substrates clearly play a key role in the denitrification process, impacting directly on the development of the bacterial population and, therefore, on the long-term removal efficiency. Therefore, the above-mentioned factors clearly influence on the denitrification process being very important for an appropriate microbial diversity and ecosystem restoration (Benyoucef et al, 2013;Cheikh et al, 2013;Avila et al, 2013;Tait et al, 2013).…”

Section: Archaeal Phylotypes Very Closely Related To Members Of the Omentioning

confidence: 99%

“…due to intensified agriculture, industrialization and urbanization (Benyoucef et al, 2013). To be specific, wastewaters with nitrogen compounds (nitrate, nitrite, ammonia, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, nitrosamines are carcinogenic compounds that can be formed from nitrite in the stomach . In addition, ammonia and increased reactive nitrogen discharged into aquatic environments can cause serious oxygen depletion in those environments and, in general, nitrogen compounds can cause eutrophication of lakes and rivers (Benyoucef et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Start-up and performance of UASB reactors using zeolite for improvement of nitrate removal process

Montalvo

Guerrero

Robles

et al. 2014

Ecological Engineering

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A first study on the use of Chilean natural zeolite of different particle sizes (0.5, 1 and 2 mm in diameter) in laboratory-scale batch denitrificant reactors was carried out with the aim of assessing the microbial communities adhered to this material. Molecular techniques such as fluorescence in situ hybridization (FISH) and denaturing gradient gel electrophoresis (DGGE) fingerprints revealed a high microbial diversity with a strong presence of Gammaproteobacteria (70% of the total microorganisms) in reactors with zeolite 0.5 mm in diameter. Archaea were only detected in the reactors with zeolite 1 mm in diameter. In addition, the acclimatization and start-up of two UASB reactors 2 (one without zeolite and the other with added zeolite 1 mm in diameter) were conducted following three consecutive and progressive stages using upward velocities from 0.10 to

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Section: Archaeal Phylotypes Very Closely Related To Members Of the Omentioning

confidence: 99%

“…due to intensified agriculture, industrialization and urbanization (Benyoucef et al, 2013). To be specific, wastewaters with nitrogen compounds (nitrate, nitrite, ammonia, etc.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Start-up and performance of UASB reactors using zeolite for improvement of nitrate removal process

Montalvo

Guerrero

Robles

et al. 2014

Ecological Engineering

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“…septic systems and commercial activities (Benyoucef et al, 2013;Cheikh et al, 2013). It causes eutrophication problems of rivers, lakes and seas, destroys water quality and presents potential hazards on human health.…”

mentioning

confidence: 99%

“…The WHO guideline value for nitrate is 50 mg l -1 . It needs to be regulated in water basically because excess levels of nitrate effects on health by forming methemoglobinoma in children, hypertension, thyroid disability and carcinogenicity hazard of nitrosamine (Benyoucef et al, 2013). Current nitrate removal techniques include ion exchange, biological denitrification, chemical treatment, reverse osmosis, electrodialysis, catalytic denitrification, membrane filtration, electrocoagulation and adsorption (Zhang et al, 2009;Malekian et al, 2011;Montalvo et al, 2011;Andalib et al, 2012;Rezakazemi et al, 2012;Bravo et al, 2013;Jiang et al, 2013;Yu et al, 2013).…”

mentioning

confidence: 99%

Water Solution Polishing of Nitrate Using Potassium permanganate Modified Zeolite: Parametric experiments, kinetics and equilibrium analysis

Alinejad¹,

Mohseni‐Bandpei²,

Ghaderpoori³

2016

Global NEST Journal

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In the present study, adsorption potential of potassium permanganate (Hypermangan) modified zeolite was investigated for the removal of nitrate from synthetic wastewater. Effects of the most significant parameters (pH, adsorbent dose, nitrate concentration and contact time) were initially evaluated based on the percentage of nitrate removed from the water solutions. Over 90 % removal of 150 mg l -1 nitrate was achieved at an optimum pH of 5, adsorbent dose of 2g l -1 after a 60 min contact time. The chemical and morphological characterizations of Hypermangan modified zeolite (HMZ) were carried out by using scanning electron microscopy (SEM), fourier transform infrared (FT-IR), x-ray diffraction (XRD) and x-ray fluorescence (XRF) analysis methods. Kinetic evaluation indicated that the nitrate adsorption onto HMZ followed the pseudofirst-order model. The equilibrium data assessment illustrated the removal of nitrate by HMZ follows a Langmuir model which attains the maximum adsorption capacity 6.7 mg g -1 .The mean free energy of adsorption was 0.15 kJ mol -1 , which indicates the adsorption of nitrate onto HMZ, occurs through a physical mechanism.

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Remediation of nitrate-contaminated water by solid-phase denitrification process—a review

Ashok

Hait

2015

Environ Sci Pollut Res

129

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The paper presents a compilation of various autotrophic and heterotrophic ways of solid-phase denitrification. It covers a complete understanding of various pathways followed during denitrification process. The paper gives a brief review on various governing factors on which the process depends. It focuses mainly on the solid-phase denitrification process, its applicability, efficiency, and disadvantages associated. It presents a critical review on various methodologies associated with denitrification process reported in past years. A comparative study has also been carried out to have a better understanding of advantages and disadvantages of a particular method. We summarize the various organic and inorganic substances and various techniques that have been used for enhancing denitrification process and suggest possible gaps in the research areas whi'ch are worthy of future research.

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Denitrification of groundwater using Brewer's spent grain as biofilter media

Cited by 17 publications

References 35 publications

Start-up and performance of UASB reactors using zeolite for improvement of nitrate removal process

Start-up and performance of UASB reactors using zeolite for improvement of nitrate removal process

Water Solution Polishing of Nitrate Using Potassium permanganate Modified Zeolite: Parametric experiments, kinetics and equilibrium analysis

Remediation of nitrate-contaminated water by solid-phase denitrification process—a review

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